Question

a block cut from asteroid rock was measured to have dimensions: 23.3 mm × 32.4 mm × 55.2mm

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Answer 1

a) $23.3mm = 0.0233m \\32.4mm = 0.0324m \\55.2mm = 0.0552m$.
b) Since the volume formula of a square is $V=L\cdot W\cdot H$ $\Rightarrow$ the volume of this specific block is $0.0233\cdot 0.0324\cdot 0.0552 = 0.000041671584m=41671584\cdot10^{-12}m$.